/*
 * Copyright 2002-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.scheduling.support;

import java.util.Date;

import org.springframework.lang.Nullable;
import org.springframework.scheduling.TriggerContext;

/**
 * Simple data holder implementation of the {@link TriggerContext} interface.
 *
 * @author Juergen Hoeller
 * @since 3.0
 */
public class SimpleTriggerContext implements TriggerContext {

    @Nullable
    private volatile Date lastScheduledExecutionTime;

    @Nullable
    private volatile Date lastActualExecutionTime;

    @Nullable
    private volatile Date lastCompletionTime;


    /**
     * Create a SimpleTriggerContext with all time values set to {@code null}.
     */
    public SimpleTriggerContext() {
    }

    /**
     * Create a SimpleTriggerContext with the given time values.
     *
     * @param lastScheduledExecutionTime last <i>scheduled</i> execution time
     * @param lastActualExecutionTime    last <i>actual</i> execution time
     * @param lastCompletionTime         last completion time
     */
    public SimpleTriggerContext(Date lastScheduledExecutionTime, Date lastActualExecutionTime, Date lastCompletionTime) {
        this.lastScheduledExecutionTime = lastScheduledExecutionTime;
        this.lastActualExecutionTime = lastActualExecutionTime;
        this.lastCompletionTime = lastCompletionTime;
    }


    /**
     * Update this holder's state with the latest time values.
     *
     * @param lastScheduledExecutionTime last <i>scheduled</i> execution time
     * @param lastActualExecutionTime    last <i>actual</i> execution time
     * @param lastCompletionTime         last completion time
     */
    public void update(Date lastScheduledExecutionTime, Date lastActualExecutionTime, Date lastCompletionTime) {
        this.lastScheduledExecutionTime = lastScheduledExecutionTime;
        this.lastActualExecutionTime = lastActualExecutionTime;
        this.lastCompletionTime = lastCompletionTime;
    }


    @Override
    @Nullable
    public Date lastScheduledExecutionTime() {
        return this.lastScheduledExecutionTime;
    }

    @Override
    @Nullable
    public Date lastActualExecutionTime() {
        return this.lastActualExecutionTime;
    }

    @Override
    @Nullable
    public Date lastCompletionTime() {
        return this.lastCompletionTime;
    }

}
